Variational bayes
-
Biến thiên sinh học bao gồm biến thiên cá thể (Intra-individual coefficient of variation) và biến thiên quần thể (Inter-individual coefficient of variation). Biến thiên sinh học có nhiều ứng dụng trong thực hành xét nghiệm y khoa. Biến thiên sinh học được sử dụng để thiết lập tiêu chuẩn chất lượng cho các xét nghiệm. Bài viết trình bày những ứng dụng của biến thiên sinh học trong phòng xét nghiệm y khoa.
4p vidudley 20-02-2023 8 3 Download
-
This paper presents the annual monitoring data on the water environment of the two mouths of the Cai river and Tac river, Nha Trang bay, during the period 2015–2019. Statistical data showed an increase in dissolved oxygen demand (DO), biological oxygen demand BOD5, and the concentrations of ammonia, Zn and Cu. Seasonal variation revealed that most of studied parameters’ concentrations, especially nutrients, were higher in the rainy season.
6p vipagani 24-10-2022 10 2 Download
-
This initial research focused on determining the spawning seasons based on observations of gonadogenesis development of A. florida and A. robusta and variation of egg average sizes of these two species and A. hyacinthus.
8p vipagani 24-10-2022 9 3 Download
-
Study on the variation of bed shear stress by using SWAN model in Cam Ranh Bay and Thuy Trieu lagoon
In this paper, SWAN model was used to calculate and discuss the spatial variation of bed shear stress, taking into consideration the effects of wind velocity and direction at Cam Ranh bay and Thuy Trieu lagoon.
8p vipagani 24-10-2022 11 2 Download
-
Bài viết Một cách giải bài toán suy diễn hậu nghiệm trong mô hình chủ đề trình bày bài toán suy diễn hậu nghiệm này thường đưa về một bài toán tối ưu không lồi thuộc lớp bài toán NP-Hard. Để giải bài toán suy diễn hậu nghiệm trong mô hình chủ đề, có nhiều phương pháp đã được đề xuất như: Phương pháp biến phân Variational Bayes (VB), collapsed variational Bayes (CVB) hay phương pháp collapsed Gibbs sampling (CGS).
3p vimegwhitman 10-06-2022 15 2 Download
-
Multiplexed single-cell RNA-seq analysis of multiple samples using pooling is a promising experimental design, offering increased throughput while allowing to overcome batch variation. To reconstruct the sample identify of each cell, genetic variants that segregate between the samples in the pool have been proposed as natural barcode for cell demultiplexing.
12p vielonmusk 30-01-2022 8 0 Download
-
RNA splicing is an important driver of heterogeneity in single cells through the expression of alternative transcripts and as a determinant of transcriptional kinetics. However, the intrinsic coverage limitations of scRNA-seq technologies make it challenging to associate specific splicing events to cell-level phenotypes.
15p viarchimedes 26-01-2022 6 0 Download
-
Variations in the population of lancelets inhabiting Chabahar Bay were surveyed statistically. Multivariate analysis of the Iranian Branchiostoma population using 5 morphometric characteristics indicates no separation of populations by locality in the study area (ANOSIM global; R = 0.2). Principal component analysis of the mean values of the 5 meristic characteristics of the present population with those of conspecifics of other populations around the world showed that Iranian lancelet populations are very similar to B. lanceolatum and completely different from the B. arabia and B.
8p dolomite36 30-12-2021 8 0 Download
-
An analysis of the taxonomic diversity of benthic diatoms was carried out for near-shore biotopes of Crimea with different content of trace metals and organic pollutants (PCBs, PAHs, DDTs). Taxonomic distinctness indices such as average taxonomic distinctness, AvTD (Δ+) and variation in taxonomic distinctness, VarTD (Λ+) were used for evaluation of the hierarchical structure of diatom taxocenes of two intact sites (Dvuyakornaya Bay and Cape Fiolent) and two heavily polluted water areas (Sevastopol Bay and Balaklava Bay).
11p tudichquannguyet 29-11-2021 7 1 Download
-
The carrageenan quality was done for a 60-day cultivation period, the carrageenan yield and gel strength showed little variation with the higher values (28.1 - 28.7 % and 855 - 935 g cm-2 , respectively) obtained from November 2014 to March 2015 and lower ones (25.1 - 26.7 % and 555 - 758 g cm-2 , respectively) from April to September 2015. The data on moisture content of alga (33.5 - 36.8 %), clean anhydrous algal/salt ratio (0.92 - 1.07), and carrageenan yield obtained in this study fulfilled those of standards for carrageenophytes.
9p spiritedaway36 25-11-2021 11 1 Download
-
Accumulating evidence suggests that genome plasticity allows filamentous plant pathogens to adapt to changing environments. Recently, the generalist plant pathogen Phytophthora ramorum has been documented to undergo irreversible phenotypic alterations accompanied by chromosomal aberrations when infecting trunks of mature oak trees (genus Quercus). In contrast, genomes and phenotypes of the pathogen derived from the foliage of California bay (Umbellularia californica) are usually stable.
19p vibeauty 23-10-2021 12 1 Download
-
Feature extraction (FE) is difficult, particularly if there are more features than samples, as small sample numbers often result in biased outcomes or overfitting. Furthermore, multiple sample classes often complicate FE because evaluating performance, which is usual in supervised FE, is generally harder than the two-class problem.
26p vikentucky2711 24-11-2020 17 1 Download
-
Computational fusion approaches to drug-target interaction (DTI) prediction, capable of utilizing multiple sources of background knowledge, were reported to achieve superior predictive performance in multiple studies.
18p viflorida2711 30-10-2020 13 3 Download
-
Bài báo trình bày một hướng tiếp cận mới tích hợp mối quan hệ phụ thuộc giữa sự biến động các hệ sinh thái với thành phần vật chật và môi trường trầm tích trong mối quan hệ với sự thay đổi mực nước biển từ 10.000 năm đến nay tại vùng biển từ cửa Thái Bình xuống vùng biển Cửa Đáy.
18p tamynhan4 06-09-2020 14 2 Download
-
The investigation of phytoplankton structure can examine spatial and temporal variations in chlorophyll a of various phytoplankton size classes and provide more knowledge of phytoplankton dynamic characteristics in coastal estuarine.
8p quenchua5 14-05-2020 8 0 Download
-
This paper represents the beginning of a reference data base for the long term assessment and control of environmental impacts on the coral reef habitat of the Balhaf Bay, Gulf of Aden, following the development of an industrial complex on the bay. Present results reveal a high surface water temperature in summer with the tendency for relatively low temperature in the winter months. Bottom water temperature undergoes significant seasonal variation, with the annual difference at the two studied stations found to be up to 13.
5p kethamoi1 20-11-2019 17 1 Download
-
Seasonal variations in the composition, density and diversity of the epipelic diatom assemblages were investigated monthly from March, 1999, to September, 2000, at 8 sampling sites chosen in the littoral of Izmit Bay. The main physical and chemical parameters, which affected species composition and density, were also measured on every sampling date.
12p vineptune2711 31-10-2019 6 0 Download
-
In the present study, the seasonal variations of density and biomass of the Merismopedia species, which were dominant at certain times in the epipelic algal flora on the littoral sediments of Izmit Bay, were investigated. In addition, some physical and chemical parameters were measured.
8p viminotaur2711 30-10-2019 6 0 Download
-
The problem of posterior inference for individual documents is particularly important in topic models. However, it is often intractable in practice. Many existing methods for posterior inference such as variational Bayes, collapsed variational Bayes and collapsed Gibbs sampling do not have any guarantee on either quality or rate of convergence.
13p vimariecurie2711 30-07-2019 23 1 Download
-
We describe experiments with a Naive Bayes text classifier in the context of anti- spam E-mail filtering, using two different statistical event models: a multi-variate Bernoulli model and a multinomial model. We introduce a family of feature ranking functions for feature selection in the multinomial event model that take account of the word frequency information. We present evaluation results on two publicly available corpora of legitimate and spam E-mails.
8p bunthai_1 06-05-2013 70 3 Download